package com.zhou.framework.util;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

/**
 * 属性文件工具类
 */
public final class PropsUtil {
    private static final Logger LOGGER = LoggerFactory.getLogger(PropsUtil.class);

    /**
     * 加载属性文件
     */
    public static Properties loadProps(String fileName) {
        Properties props = null;
        InputStream ins = null;


        try {
            ins = Thread.currentThread().getContextClassLoader().getResourceAsStream(fileName);
            if (ins == null) {
                throw new FileNotFoundException(fileName + "is not found");
            }
            props = new Properties();
            props.load(ins);
        } catch (IOException e) {
            LOGGER.error("load propertie file failure", e);
        }finally {
            if (ins != null){
                try {
                    ins.close();
                } catch (IOException e) {
                    LOGGER.error("close input stream failure", e);
                }
            }
        }
        return props;
    }
    /**
     * 获取字符型属性(默认值为空字符串)
     */
    public static String getString(Properties props, String key){
        return getString(props,key,"");

    }
    /**
     * 获取字符型属性(可指定默认值)
     */
    public static String getString(Properties props, String key, String defaultValue){
        String value = defaultValue;
        if (props.containsKey(key)){
            value = props.getProperty(key);
        }
        return value;
    }
    /**
     * 获取数值型属性(默认值为0)
     */
    public static int getInt(Properties props, String key){
        return PropsUtil.getInt(props,key,0);
    }
    /**
     * 获取数值型属性(可指定默认值)
     */
    public static int getInt(Properties props, String key, int defaultValue){
        int value = defaultValue;
        if (props.containsKey(key)){
            value = CastUtil.castInt(props.getProperty(key));
        }
        return value;
    }
    /**
     * 获取布尔型属性(默认值为false)
     */
    public  static boolean getBoolean(Properties props, String key){
        return PropsUtil.getBoolean(props,key,false);
    }
    /**
     * 获取布尔型属性(可指定默认值)
     */
    public  static boolean getBoolean(Properties props, String key, boolean defaultValue){
        boolean value = defaultValue;
        if (props.containsKey(key)){
            value = CastUtil.castBoolean(props.getProperty(key));
        }
        return value;
    }
}
